Home
Class 12
PHYSICS
A^(238) Unucleus decays by emitting an a...

`A^(238) U`nucleus decays by emitting an alpha particle of speed `ums^(-1)` The recoil speed of the residual nucleus is: (in `ms^(-1)`)

A

`(4u)/(238)`

B

`-(4u)/(234)`

C

`(4u)/(234)`

D

`-(4u)/(238)`

Text Solution

Verified by Experts

The correct Answer is:
C
`U^(238) rarr U^(234)+._(2)He^(4)`
Let recoil speed be V then by COLM
`234 V=4uimplies V=(4u)/234`
Promotional Banner

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise-05 [A]|39 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise-05 [B]|12 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise-04 [A]|20 Videos

  • RACE

    ALLEN|Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|24 Videos

  • TEST PAPER

    ALLEN|Exercise PHYSICS|4 Videos

Similar Questions

Explore conceptually related problems

which a U^(238) nucleus original at rest , decay by emitting an alpha particle having a speed u , the recoil speed of the residual nucleus is

which a U^(238) nucleus original at rest , decay by emitting an alpha particle having a speed u , the recoil speed of the residual nucleus is

A uranium 238 nucleus, initially at rest emits an alpha particle with a speed of 1.4xx10^7m/s . Calculate the recoil speed of the residual nucleus thorium 234. Assume that the mas of a nucleus is proportional to the mass number.

A uranium 238 nucleus, initially at rest emits n alpha particle with a speed of 1.4xx10^7m/s . Calculate the recoil speed of the residual nucleus thorium 234. Assume that the mass of a nucleus is proportional to the mass number.

A radioactive nucleus of mass number A, initially at rest, emits an alpha- particle with a speed v. What will be the recoil speed of the daughter nucleus ?

._(92)^(238)U has 92 protons and 238 nucleons. It decays by emitting an alpha particle and becomes:

A nucleus of ._84^210 Po originally at rest emits alpha particle with speed v . What will be the recoil speed of the daughter nucleus ?

A nucleus of ._84^210 Po originally at rest emits alpha particle with speed v . What will be the recoil speed of the daughter nucleus ?

A nucleus ""^(220)X at rest decays emitting an alpha -particle . If energy of daughter nucleus is 0.2 MeV , Q value of the reaction is

During alpha-decay , a nucleus decays by emitting an alpha -particle ( a helium nucleus ._2He^4 ) according to the equation ._Z^AX to ._(Z-2)^(A-4)Y+._2^4He+Q In this process, the energy released Q is shared by the emitted alpha -particle and daughter nucleus in the form of kinetic energy . The energy Q is divided in a definite ratio among the alpha -particle and the daughter nucleus . A nucleus that decays spontaneously by emitting an electron or a positron is said to undergo beta -decay .This process also involves a release of definite energy . Initially, the beta -decay was represented as ._Z^AX to ._(Z+1)^AY + e^(-)"(electron)"+Q According to this reaction, the energy released during each decay must be divided in definite ratio by the emitted e' ( beta -particle) and the daughter nucleus. While , in alpha decay, it has been found that every emitted alpha -particle has the same sharply defined kinetic energy. It is not so in case of beta -decay . The energy of emitted electrons or positrons is found to vary between zero to a certain maximum value. Wolfgang Pauli first suggested the existence of neutrinoes in 1930. He suggested that during beta -decay, a third particle is also emitted. It shares energy with the emitted beta particles and thus accounts for the energy distribution. During beta^+ decay (positron emission) a proton in the nucleus is converted into a neutron, positron and neutrino. The reaction is correctly represented as

ALLEN-SIMPLE HARMONIC MOTION-Exercise-04 [B]
  1. At a specific instant emission of radioactive compound is deflected in...

    Text Solution

    |

  2. Which of the following EM ratiation has least wavlenght ?

    Text Solution

    |

  3. A^(238) Unucleus decays by emitting an alpha particle of speed ums^(-1...

    Text Solution

    |

  4. A radioactive sample at any instant has its disintegration rate 5000 d...

    Text Solution

    |

  5. A nucleus with Z =92 emits the following in a sequence: alpha,beta^(...

    Text Solution

    |

  6. Which of the following cannot be emitted by radioactive substances dur...

    Text Solution

    |

  7. In the nuclear fusion reaction ""(1)^(2)H+""(1)^(3)Hto""(2)^(4)He+""(0...

    Text Solution

    |

  8. A nucleus ruptures into two nuclear parts, which have their velocity r...

    Text Solution

    |

  9. The binding energies per nucleon for deuteron (.1H^2) and helium (.2He...

    Text Solution

    |

  10. An alpha particle of energy 5 MeV is scattered through 180^(@) by a fi...

    Text Solution

    |

  11. The intensity of gamma radiation from a given source is I. on passing ...

    Text Solution

    |

  12. Starting with a sample of pure ""^(66)Cu,(7)/(8) of it decays into Zn ...

    Text Solution

    |

  13. If the nucleus .(13)^(27)Al has a nuclear radius of about 3.6 fm, then...

    Text Solution

    |

  14. A nuclear transformation is given by Y (n,alpha ) rarr.(3)Li^7 . The...

    Text Solution

    |

  15. An alpha nucleus of energy (1)/(2)mv^(2) bomobards a heavy nuclear tar...

    Text Solution

    |

  16. When .3Li^7 nuclei are bombarded by protons , and the resultant nucl...

    Text Solution

    |

  17. The energy spectrum of beta - particle [number N(E) as a function of b...

    Text Solution

    |

  18. If the binding energy per nucleon in .(3)Li^(7) and .(2)He^(4) nuclei ...

    Text Solution

    |

  19. If MO is the mass of an oxygen isotope .8O^(17) ,Mpand Mn are the ma...

    Text Solution

    |

  20. In a gamma ray emission from nucleus:

    Text Solution

    |